Roll onto floured surface into a 15x20 rectangle. Spread dough with ½ cup melted butter. Mix together 1 ½ cups sugar and cinnamon, next sprinkle over buttered dough. Sprinkle with walnuts, and roll up jellyroll-fashion and pinch edge together to seal. Cut into 12 to 15 slices. Coat bottom of 9x13 and 8” square baking pans with ½ cup melted butter, next sprinkle with ¼ cup sugar. Place cinnamon roll slices close together in pans. Let rise in warm place until dough is doubled in size, about 45 minutes. Bake in preheated oven at 350 degrees for 25 to 30 minutes or until rolls are nicely browned. Cool rolls slightly.